Nitrogen and phosphorus removal advanced treatment method for wastewater

A technology for advanced treatment, denitrification and dephosphorization, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, osmosis/dialysis water/sewage treatment, etc. Meet water quality discharge standards, unstable treatment effects, etc., and achieve the effects of low operating costs, easy maintenance and management, and simple structure

Active Publication Date: 2015-07-08
广西华坤检测技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the problems of carbon source, sludge age, and nitrate, these methods of nitrogen and phosphorus removal have poor effect on the simultaneous removal of N and P, and the treatment effect is unstable. It is difficult to meet the water quality discharge standard, and the purified water still contains a lot of nutrients. Elements can also cause eutrophication of water bodies
Algae is a common organism in lakes, which has a special metabolic mode. Since Oswald et al. proposed in 1957 that microalgae can be used as a biological system instead of activated sludge for sewage treatment, algae biological nitrogen and phosphorus removal technology has received more and more attention. It is worth noting that its utilization methods mainly include suspended algae system, immobilized algae system and algae biofilm system. Membrane Nitrogen and Phosphorus Removal was studied

Method used

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  • Nitrogen and phosphorus removal advanced treatment method for wastewater
  • Nitrogen and phosphorus removal advanced treatment method for wastewater
  • Nitrogen and phosphorus removal advanced treatment method for wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Such as figure 1 As shown, the sewage containing 20mg / L of ammonia nitrogen, 10mg / L of phosphorus, and 300 mg / L of COD is passed into the pretreatment tank, and polyacrylamide with a molecular weight of 12 million is added in an amount of 1-5ppm of the sewage; Place it for 2 hours to remove the sediment, and the clean sewage enters the algae membrane bioreactor divided into 4 sections. Each section of the reactor has Chlorella pyrenoidosa, Anabaena blooms and Coleopsis algae, and the light intensity is 3000lux; from the end of the reactor A section of outflow water enters the inclined plate sedimentation tank, and polyacrylamide with a molecular weight of 12 million is added, and the amount of addition is 1ppm of the water volume, and it is left to stand for 2 hours. The suspended solids are deposited and discharged uniformly through the sludge collection system at the bottom of the pool. Filtrate with a tubular polyamide filter membrane module, the pore size of the polya...

Embodiment 2

[0032] Such as figure 1 As shown, the sewage containing 23mg / L of ammonia nitrogen, 12mg / L of phosphorus, and 320 mg / L of COD is passed into the pretreatment tank, and polyacrylamide with a molecular weight of 10 million is added in an amount of 1-5ppm of the amount of sewage; Set aside for 3 hours to remove the sediment, and the clean sewage enters the algae membrane bioreactor divided into 6 sections. Each section of the reactor is planted with Chlorella pyrenoidosa, Anabaena blooms, Coleopsis, Scenedesmus obliquus, and Oscillating algae. and water net algae; the light intensity is 3200lux; the water flowing out from the last section of the reactor enters the inclined plate sedimentation tank, and polyacrylamide with a molecular weight of 10 million is added in an amount of 2ppm of the water amount, and the suspended matter is deposited after standing for 3 hours , discharged through the sludge collection system at the bottom of the pool, and the clean water is filtered with...

Embodiment 3

[0034] Such as figure 1 As shown, the sewage containing 25mg / L of ammonia nitrogen, 15mg / L of phosphorus, and 350 mg / L of COD is passed into the pretreatment tank, and cationic polyacrylamide with a molecular weight of 6 million is added, and the amount of addition is 1-5ppm of the amount of sewage; Stand for 4 hours, remove the sediment, and the clean sewage enters the algae membrane bioreactor divided into 8 sections. The first 4 sections of the reactor are planted with Chlorella pyrenoidosa, Anabaena blooms, Coleopsis, Scenedesmus obliquus, A. Oscillating algae and Hydroreticula, the last four stages are Chlorella pyrenoidosa, Anabaena blooms and Coleoptera; the light intensity is 3200lux; the water flowing out from the last stage of the reactor enters the inclined plate sedimentation tank, and the added molecular weight is 6 million The cationic polyacrylamide is added in an amount of 3ppm of the water, and after standing for 4 hours, the suspended solids are deposited and...

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Abstract

The invention provides a nitrogen and phosphorus removal advanced treatment method for wastewater. The method mainly comprises the following steps: pretreatment, alga membrane bioreactor treatment, plate sedimentation tank treatment and membrane filtration treatment. The method specifically comprises the following steps: first, pre-treating wastewater; then, introducing the wastewater to an alga membrane bioreactor for efficiently removing nitrogen and phosphorus for the wastewater; then, introducing the wastewater to a plate sedimentation tank to precipitate suspended solids so as to prevent subsequent membrane filtration from being blocked; and finally, filtering the wastewater by a membrane assembly, and storing the filtrate in a permeate pool to be recycled conveniently. The method integrates biological, physical and chemical methods, and can efficiently remove nitrogen and phosphorus and pollutants in wastewater. The whole method is simple in structure, convenient to manage and maintain, low in operating cost and free from bad smells and secondary pollution. The water quality discharged can reach the national first level A standard, and the water can be recycled, so that the utilization efficiency of water resources is improved.

Description

technical field [0001] The invention relates to the field of sewage treatment, and relates to an advanced treatment method for denitrification and dephosphorization of sewage by using algae biofilm. Background technique [0002] With population growth and economic development, human demand for water continues to increase. At the same time, the advancement of science and technology makes its activity area continue to expand, resulting in the gradual increase in the breadth and depth of environmental pollution. In particular, the eutrophication of lake water has become a phenomenon It is a global environmental problem, and the excessive discharge of elements such as nitrogen and phosphorus into the water body is a key factor causing eutrophication of the water body. Therefore, seeking a new and efficient method for nitrogen and phosphorus removal is an important issue in the protection and management of water environment in my country. At present, the conventional methods for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/56C02F1/44
CPCY02W10/37
Inventor 魏群孙红云郭莉娜叶华张金莲周军蔡元妃
Owner 广西华坤检测技术有限公司
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